Initial submission after saving correction (V5) 1487190202 Assigned ID: 971 ----- Attempting Submission 1 (Fri Apr 11 22:37:04 GMT 2014) ----- HST Phase I Proposal 971 (apt) successfully submitted. ----- Attempting Submission 2 (Fri Apr 11 22:38:35 GMT 2014) ----- HST Phase I Proposal 971 (apt) successfully submitted. ----- Attempting Submission 3 (Fri Apr 11 23:22:56 GMT 2014) ----- HST Phase I Proposal 971 (apt) successfully submitted. ----- Attempting Submission 4 (Fri Apr 11 23:45:30 GMT 2014) ----- HST Phase I Proposal 971 (apt) successfully submitted. ----- Attempting Submission 5 (Sat Apr 12 00:02:22 GMT 2014) ----- HST Phase I Proposal 971 (apt) successfully submitted. ----- Attempting Submission 6 (Sat Apr 12 00:10:06 GMT 2014) ----- Visits (02, 03) have a relative orient link whose targets (13855-02-L221-60, 13855-03-GJ3054) are separated by more than 1 degree. This may make it impossible to get guide stars. Visits (02, 03) have a relative orient link whose targets (13855-02-L221-60, 13855-03-GJ3054) are separated by more than 1 degree. This may make it impossible to get guide stars. Visits (02, 03) have a relative orient link whose targets (13855-02-L221-60, 13855-03-GJ3054) are separated by more than 1 degree. This may make it impossible to get guide stars. Visits (02, 03) have a relative orient link whose targets (13855-02-L221-60, 13855-03-GJ3054) are separated by more than 1 degree. This may make it impossible to get guide stars. Resubmission with orient changes for visits 01 and 04, conformly to discussions with support contact and contact scientist, to enable guide stars. fgs3 needed for guide stars added seq non-int -2013454460 ----- Attempting Submission 1 (Thu Jul 24 14:51:36 GMT 2014) ----- HST Phase II Proposal 13855 (phaseII.apt) successfully submitted. ----- Attempting Submission 2 (Thu Aug 14 19:56:11 GMT 2014) ----- ----- Attempting Submission 3 (Fri Aug 15 13:06:11 GMT 2014) ----- ----- Attempting Submission 4 (Wed Sep 03 17:57:58 GMT 2014) ----- There are a couple of warnings due to the fact that we have two targets observed with visits linked with orient constraints on the telescope. The warnings indicate that in this case it might be difficult to find guide stars for the visits. However, we set orients relatively loose constraints on the orients (+/-5degrees) so the orient can be adjusted to find guide stars. We propose STIS coronagraphic observations of a new debris disk recently discovered around an M dwarf in our reanalysis of NICMOS coronagraphic archive as part of the ALICE program (Archival Legacy Investigations of Circumstellar Environments, AR-12652). Our target is a young (30 Myr) M dwarf. Only two disks have been imaged so far around M dwarfs, with only one in scattered light (AU Mic). STIS coronagraphy will dramatically surpass the NICMOS discovery, with 2x better angular resolution and much improved contrast and sensitivity. These observations will allow us to measure in detail the disk geometry, determining whether parent bodies are constrained in "birth rings" analogous to the Kuiper Belt, and to search for the signatures of unseen planets gravitationally stirring the disk. Only HST/STIS is capable of obtaining, at optical wavelengths, the necessary high angular resolution, sub-arcsecond high contrast, and image fidelity that are essential for tracing the faint extended components of this disk. We are obtaining 4 HST orbits for 3 roll + 1 PSF star STIS coronagraphy for one science target (GJ3054). Our observation plan follows established best practices for STIS coronagraphy, obtaining for the target a series of deep exposures at WEDGEA1.0. We summarize our plans here, and provide further comments attached to the individual visits and observations. 1) Visit structure and linkages: we observe three science visits plus one PSF reference star visit between them (so the orbits are ordered Target-PSF-Target-Target). These four visits are linked to execute back-to-back. 2) Orientation Constraints: Our target is known to have an approximately edge-on disk. We therefore provide *absolute* orient constraints on one visit to ensure the disk major axis is near perpendicular to the STIS occulting wedge. We use relative orient constraints to roll the two other science visits 15 to 25 degrees and -15 to -25 degrees relative to the absolute orient visite. Approximately 20 degrees is the desired roll between visits since it rotates by about half the angle between the diffraction spikes and the wedge occulter, thereby minimizing the field area obscured in the three visits. The visit with the disk oriented perpendicular to the wedge provides somewhat better inner working angle for our disks (by 1/cos(20) ~ 7%). Since we expect thermal transients and instability may be greatest in the first orbit of each linked set (due to the unknown attitude of HST for prior observations), we choose to place the visit with the disk perpendicular to the wedge as the *third* visit. We set absolute Orient Range constraints accordingly. The first visit has Orient From constraints to set its orientation ~ 20 deg roll from the third visit. Similarly, the fourth visit has Orient From constraints to set its orientation ~ -20 deg roll from the third visit. For the second visit between them (the PSF star), ideally we prefer to have it at the same orientation as the third visit (this is a lower priority constraint and could easily be dropped if needed to ease scheduling, but in practice with the Visit Planner this does not appear to be a significant constraint). In summury, the visit are ordered Target(20deg)-PSF(0deg)-Target(absolute orient)-Target(-20deg). We found one schedulable window of 11 days using these constraints. If needed, we can trade a fraction of integration time for schedulabity (minimum of schedulability = 90 to keep enough integration time on the science target). 3) Guide Stars: We require pointing and roll control with 2-FGS guiding. Single-FGS guiding does not offer sufficient target position stability for coronagraphy. 4) Target Acquisitions: We expose TA images to achieve S/N ~ 100 using the STIS TA ETC. Because we will use the TA images to assess "behind the wedge" target positions to high precision, higher S/N than the default 40 is required. We use F25ND3 for all TA exposures. 5) Exposure times: Science target: considering the faintness of the target, we set the exposure time to the maximum available in the orbit after the target acquisition exposure, with CR-SPLIT of 3, which is the best trade-off between cosmic ray processing and read out noise. We estimate 25% of full well capacity at the edge of the wedge for the individual exposure time, which is to scale with acquisition of TW Hydrae with the same observing parameters in program GO 8624 (PI Weinberger). PSF star: the PSF star is 2.6 times brighter than the science star. To have the same noise statistics in science and PSF acquisition, we shortened the exposure time by 2.6 for the reference star, which gives about the same total exposure time but CR-SPLIT 8 instead of 3 for the science star. This strategy also provides more PSF acquisitions, we will improve postprocessing with a better selection or linear combination matching telescope breathing state in the science images. The exposures are obtained with GAIN=4 and subarray SIZEAXIS2=427. This gives a field of view 21.65" in size centered on the WEDGE1.0 position 10.82" inset along the wedge away from the field of view edge. This is the same subarray we have used previously for STIS observations at the wedge 1.0" position. 7) PSF star selection. We choose a PSF star (L221-60) that is close in the sky (< 8 deg), about one magnitude brighter than the science target, is closely matched in optical colors (UBVRI) and measured effective temperature and spectral type, and for which available literature information indicates a high probability this is a single star, not a close binary. Details of the specific selection criteria is provided in target notes. -------- Realtime Justification -------- n/a ------ Calibration Justification ------- n/a DEBRIS DISKS Default false false false false false SUPPORTED STAR CIRCUMSTELLAR MATTER DISK M III-I This object was generated by the targetselector and retrieved from the SIMBAD database. Vmag from Koen+2002 IBV(RI)c photometric catalog. Circumstellar disk detected with NIMCOS, with PA = 27deg E of N. HIP3556 J2000 J2000 Koen+2002 photometry: B-V=1.52 U-B=1.142 V-R=1.026 V-I=2.25 STAR M III-I This object was generated by the targetselector and retrieved from the SIMBAD database. PSF star selected for GJ 3054. Best match to B-V, U-B, V-R and V-I colors within 8 degrees in the catalog "IBV(RI)c photometry of HIP red stars (Koen+,2002)". Tycho B-V is not consistent but is also the best color match within 10deg. All color matches are better than 0.1mag, except for V-I which is off by 0.164mag. Hipparcos show no trace of multiplicity. PSF star is 7.6 deg separation from the science target. No reliable I mag flux in literature; V-I color from Pickles 2010 spectral fits to Tycho+USNO+2MASS. J2000 Koen+2002 photometry: B-V=1.511 U-B=1.185 V-R=0.981 V-I=2.086 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 STIS/CCD Imaging Yes No WEDGEA1.0 1408046006121 Timing link suitability includes constraints ([02 After 01 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. Edge-on disk major axis is at position angle ~ 27 degrees. As noted in the Proposal Description, we prefer to schedule the 2nd science visit (3rd visit of the program) with the disk perpendicular to the STIS wedge. For this 1st visit, we want it offset in roll angle by either + or - 20 degrees with respect to that third visit, with loose tolerance of ~ 5 deg around that nominal offset. EDIT: no guide stars can be found for visit 04 with these ranges, so we decided (with Alison Vick and John Debes) to push orient of visit 01 closer to the spiders (30degrees instead of 20), and squeeze orient of visit 04 between 01 and 03 (so 15degrees instead of -20). (Tic-Visit :proposal-id 13855 :visit-id "01" :proposal-version -1 :trans-version "20140605" :date "14-Aug-2014 15:53:25.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 23040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13855 :visit-id "01" :obset-id "01" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13855 :visit-id "01" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3063 :al-overhead-at-end 0 :internal-dur-at-end 325 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3409 :pcs-gap 0 ) false 1 0 1408046008000 Timing link suitability includes constraints ([02 After 01 by 0.0 to 0.1 days] [03 After 02 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. PSF star for visits V1, V2, and V3. Ideally this should be observed at similar spacecraft orientation as Visit V2, but this constraint can be relaxed if needed for schedulability. (Tic-Visit :proposal-id 13855 :visit-id "02" :proposal-version -1 :trans-version "20140605" :date "14-Aug-2014 15:53:27.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 60720 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13855 :visit-id "02" :obset-id "02" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13855 :visit-id "02" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3026 :al-overhead-at-end 0 :internal-dur-at-end 366 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3409 :pcs-gap 0 ) false 1 0 PSF is V=11.07 and SCI is V=12.13, so PSF is 2.6 times brighter. To have the same SNR, the exposures are 2.6 time shorter (so 300s instead of 800s). We also get 2400s total, but CR-split 8 instead of 3 for the science target 1408046009249 Timing link suitability includes constraints ([03 After 02 by 0.0 to 0.1 days] [04 After 03 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. Edge-on disk major axis is at position angle ~ 27 degrees. As noted in the Proposal Description, we prefer to schedule this 2nd science visit with the disk perpendicular to the STIS wedge, hence PA=27deg should be parallel with the AXIS1 direction. To achieve this we add either 135 or 315 degrees to that PA. Hence the desired orientation for this visit is either ORIENT ~ 342 or ORIENT ~ 162. (No preference between those two) We specify a +/- 5 deg range around the nominal orientation. If scheduling proves difficult this constraint could be relaxed slightly. (Tic-Visit :proposal-id 13855 :visit-id "03" :proposal-version -1 :trans-version "20140605" :date "14-Aug-2014 15:53:28.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 23040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13855 :visit-id "03" :obset-id "03" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13855 :visit-id "03" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3063 :al-overhead-at-end 0 :internal-dur-at-end 325 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3409 :pcs-gap 0 ) false 1 0 1408046010377 Timing link suitability includes constraints ([04 After 03 by 0.0 to 0.1 days]) The scheduling data was generated by CASM 22.2. CASM was run in Phase II mode. (Tic-Visit :proposal-id 13855 :visit-id "04" :proposal-version -1 :trans-version "20140605" :date "14-Aug-2014 15:53:30.0" :trans-errors '(:WARNINGS 0 :ERRORS 0 :HEALTH-AND-SAFETY 0 :FATAL-ERRORS 0 :CONTINUABLE-FATALS 0) :number-of-orbits 1 :saa-model "24" :si-bright-earth-limb-angle 20.0 :data-volume 23040 :tdrss-contact-duration 0 :coron NIL ) (Tic-Obset :proposal-id 13855 :visit-id "04" :obset-id "04" :pcs-mode "FGS" ) (Tic-Orbit :proposal-id 13855 :visit-id "04" :orbit-number 1 :pcs-time 333 :si-vis-utilization 3063 :al-overhead-at-end 0 :internal-dur-at-end 325 :dark-offset NIL :dark-utilization 0 :max-dark-utilization 1920 :low-sky "N" :pcs-visibility 3409 :pcs-gap 0 ) false 1 0